Adequate documentation should be a priority for each historical subject. Appropriate inventory is a key part of any museum and conservation and restoration documentation. It can be said that the subject has its own identity if it is appropriately invented. Therefore, many inventive methods will serve to apply the unique number properly. Some of the appropriate methods will be shown on the practical examples of several museums. Particular emphasis is given to methods of inventory and preventive conservation of liturgical textile items from Lopud Island.